Image processing apparatus, image processing method, and medium

Abstract

An image processing apparatus that extracts colors of patches from a photographed image data of a chart image is provided. The image processing apparatus includes: a position extraction unit configured to extract information indicating a position of the chart image in the photographed image data; an acquisition unit configured to acquire information indicating a patch position of each patch images in the chart image based on the chart image; a setting unit configured to set an extraction range in accordance with the patch position of each of the patch images in the photographed image data based on the information; a determination unit configured to determine whether or not the set extraction range fits inside each of the patch images; and a color extraction unit configured to extract a color of each patch image.

What is claimed is: 
     
       1. An image processing apparatus that extracts colors of patches from a photographed image data of a chart image, the image processing apparatus comprising:
 a processor connected to a memory, the processor and memory configured to: 
 extract information indicating a position of the chart image in the photographed image data; 
 acquire information indicating a patch position of each patch images in the chart image based on the chart image; 
 set an extraction range in accordance with the patch position of each of the patch images in the photographed image data based on the information; 
 determine whether or not the set extraction range fits inside each of the patch images; and 
 extract a color of each patch image based on pixel values of pixels included in the extraction range in a case where it is determined that the extraction range fits inside each of the patch images for all the patch images. 
 
     
     
       2. The image processing apparatus according to  claim 1 , the processor and memory further configured to display an error message in a case where it is determined that the extraction range of a certain patch image does not fit inside the certain patch image. 
     
     
       3. The image processing apparatus according to  claim 1 , the processor and memory further configured to hold patch information extracted from the photographed image data as a characteristic inherent in a device. 
     
     
       4. The image processing apparatus according to  claim 1 , wherein
 information indicating the position of the chart image is extracted in accordance with instructions from a user via a user interface. 
 
     
     
       5. The image processing apparatus according to  claim 1 , the processor and memory further configured to determine whether or not to perform resetting of the extraction range in a case where it is determined that the extraction range of a certain patch image does not fit inside the certain patch image. 
     
     
       6. The image processing apparatus according to  claim 5 , wherein
 the extraction range is reduced in a case where it is determined to perform resetting of the extraction range. 
 
     
     
       7. The image processing apparatus according to  claim 5 , wherein
 an extraction range is set in accordance with an area size of each patch image in a case where it is determined to perform resetting of the extraction range. 
 
     
     
       8. An image processing method performed by an image processing apparatus that extracts colors of patches from a photographed image data acquired by photographing a chart image, the method comprising:
 extracting information indicating a position of the chart image in the photographed image data; 
 acquiring information indicating a patch position of each patch images in the chart image based on the chart image; 
 setting an extraction range in accordance with the patch position of each of the patch images in the photographed image data based on the information; 
 determining whether or not the set extraction range fits inside each of the patch images; and 
 extracting a color of each patch image based on pixel values of pixels included in the extraction range in a case where it is determined that the extraction range fits inside each of the patch images for all the patch images. 
 
     
     
       9. A non-transitory computer readable storage medium storing a program for causing a computer to perform an image processing method that extracts colors of patches from a photographed image data acquired by photographing a chart image, the method comprising:
 extracting information indicating a position of the chart image in the photographed image data; 
 acquiring information indicating a patch position of each patch images in the chart image based on the chart image; 
 setting an extraction range in accordance with the patch position of each of the patch images in the photographed image data based on the information; 
 determining whether or not the set extraction range fits inside each of the patch images; and 
 extracting a color of each patch image based on pixel values of pixels included in the extraction range in a case where it is determined that the extraction range fits inside each of the patch images for all the patch images.